Azure App Service - My Host file - azure

I published my app on Azure App Service.
I don't want to buy domain for now.
I just want to use my local Host file to connect to my Azure App with the futur domain I will buy.
I added an entry in host file:
ip.ip.ip.ip mywebsite.com
But how could I configure my Azure App?

This will not work. Azure App Services work on the basis of DNS Names. By adding the above entry in the host file, the record will reach the App Services Front-End Servers. However, they will not be able to map the domain name to a web app and this will result in a 404 error.
You will have to map a domain name to your Azure Web App in order to get this working. This implies that you will need to own a domain name, this in turn implies that you need to buy a domain name. :-)

If you want to use an IP address, you can use a cloud service web worker role (probably with a reserved IP, if you don't want a dynamic IP) instead of an Azure web app.

Related

How to have multiple host names for azure website

I created an web app for a demo website in Azure. The domain name for this website was created when I created the app service "myapp1.azurewebsites.net". I'd like to use additional domain names using the same azurewebsites.net such as myapp2.azurewebsites.net. When I try to add this custom domain it tells me
Failed to add hostname myapp2.azurewebsites.net. Too many (2)
hostnames in the default DNS zone. Limit is 1
Is there no way around this or must I use my own custom DNS name?
For this you need to add custom domain in Azure web app.
For example : when I created the app service "myapp1.azurewebsites.net" and want to have additional domain names , you can go for custom domains like abc.com.
You can not have .azurewebsites.net as the custom domain of already existing web app as it is already owned by Microsoft Azure web app.

How to test Azure Web App that requires custom domain without using public DNS

I have an Azure Webapp on a Standard 1 Small App Service Plan, I deployed my application successfully to the webapp, but now I need to test it using a specific domain name that on client side could be configured using hosts file.
The problem is that the Azure webapp will only "recognize" the custom/specific domain (ex: myapp.mydomain.com) if I configure a Custom Domain that uses public DNS and I can't (at this moment) configure the existing domain name to be a CNAME to the Azure webapp because it is production environment, I can and will make the CNAME after the application is tested not before.
My application requires to be called by the specific domain name.
So how can I test my application on Azure webapp using a custom domain but without using public DNS using only my hosts file client side?
note: this problem doesn't even exist in AWS Beanstalk so why is this so complicated with Azure webapp. Its pretty basic
You can preemptively associate your custom domain name with your web app and test it via a client using the host file. To verify domain ownership, Add a TXT record. The TXT record maps from awverify.<subdomain> to <appname>.azurewebsites.net. Steps to do this are outlined here:
https://learn.microsoft.com/en-us/azure/app-service/manage-custom-dns-migrate-domain
Using App Service, I don't think you can do this.
It configures the underlying app to only listen for domains configured in the Web App.
So if you don't add the domain as a custom domain, requests won't be routed to the app.
The reason is that IP addresses are shared, so Azure relies on the Host header to route your request correctly.
You can add the custom domain without CNAME / A record by using the awverify record mentioned by Ken.

Connect to Azure App Service from Azure VM

I am planning on using an outsourcing team for data processing and want to avoid them downloading or storing client data on their local machines. To facilitate this, I want to create an Azure VM in which they can do all their work (msoft office, etc.) and access an ASP MVC app hosted as an app service in Azure. The MVC app is integrated with the corporate AD and for the outsourcing logins I want to see if the request is coming from my VM or the internet (the latter gets denied). So far I have:
Created a ASP MVC5 app and an Azure VM
Connected the two via VPN (point to site)
When I attempt to go to the public URL for the website on the VM, I get the "this page can't be displayed" thing, which leads me to believe I'm on the right track (now I have to update the hostfile of the machine to the private IP of the mvc app service app?). How do I do the following:
Connect to the app service via web browser (this needs to be over the vnet so that I can pick and choose in the app code who can login outside the network)
Get the network ip of the app service so I can update the VM hostfile
Am I on the right track here? Thanks in advance!
Your understanding of Azure App service is not accurate. Azure App service cannot be accessed via a private IP. They already sit inside a private vnet. They can be only accessed via public hostname with a common DNS name (azurewebsites.net)
Your scenario requires the Azure Web app and the VM to reside in the same VNET, which is not possible. There is another offering called ILB ASE, which allows you to do this. But it's a more elaborate setup. See this for more information: Using ILB with AN ASE
In your scenario you can restrict access to the web app via IP Restrictions module. See this article: IP & Domain Restrictions in Azure App Service
I understand this not the solution u wanted. What you want can be achieved via ILB ASE, but that is an expensive and elaborate set-up.
HTH
you may want to try using cloud service, though MS recommends App Service, you requirement doesn't fit into App service..
Official documentation from MS: https://learn.microsoft.com/en-us/azure/cloud-services/cloud-services-startup-tasks-common
Block a specific IP address
You can restrict an Azure web role access to a set of specified IP addresses by modifying your IIS web.config file. You also need to use a command file which unlocks the ipSecurity section of the ApplicationHost.config file.

Have Subdomain point to a different azure address

I'm trying to setup my google domains to where "blah.net" points to my app in azure sites, but I want "dev.blah.net" to point to a different app on azure (My dev instance).
Anyone know how to setup this up? I tried doing subdomain forwarding but that didn't seem to work.
I'm trying to setup my google domains to where "blah.net" points to my app in azure sites, but I want "dev.blah.net" to point to a different app on azure
You could use A record for your root domain(blah.net) and CName record for your sub domain(dev.blah.net). Steps below are for your reference.
Get production web app IP address, pre-configured domain and dev web app pre-configured domains from Azure Portal.
Configuration A record, CName record and TXT record as following in Google domain management tool.
Add hostname for your product and dev app on Azure portal.

Is it possible to move custom domain from one web app to another?

I have a custom domain www.abc.com configured for web app webapp-a, and I'd like to transfer it to webapp-b without downtime.
If I try to add the domain to webapp-b, I am getting
The host name www.abc.com is already assigned to another Azure website: webapp-a
It there a way to let webapp-a continues to serve the requests, until the DNS cache expires?
Edit: The domain has IP based SSL binding, and the DNS is caching the virtual IP.
I faced the same issue, and was able to solve it in a tricky way.
I created new App Service Plan (previously known as Web Hosting Plan), and assigned "new" Web App to it (you can do it via new portal, or you can create Service Plan during Web App creation).
Then, I was able to assign the same host name to Web Apps in different hosting plans.
Thinking about this, I feel it logical: most probably Service Plan is mapped to physical IIS machine, and you cannot have two sites with the same host name in the same IIS for the obvious reason.
After migration from one DNS to another is done, you can remove unused Service Plan (as you basically pay for each separately).
According to a blog post by the Azure App Service Team in June 2017, it would appear that Azure now supports adding the same custom domain to multiple web apps:
There are scenarios where a customer would like to add the same hostname to multiple web apps in the same subscription, having a geo distributed website is one example. Our custom hostname feature allows you to bypass validation for hostnames that have already been validated. You only need to verify domain ownership when you add a hostname for the first time. For all other apps in the same subscription, you can add the same hostname without creating any DNS records.
You can read the entire blog post at https://blogs.msdn.microsoft.com/appserviceteam/2017/06/21/custom-hostnames-with-app-service/. The quote above was taken from the Adding the same custom hostname to multiple web apps section.
This should help in scenarios such as this where you want to transfer a custom domain name from one web app to another. You can simply add the same custom domain name to both web apps, add any required SSL bindings, and then change the DNS to point to the new web app. As the DNS change propagates, traffic should gradually move over to the new web app without any downtime.
I've tested this myself in the North Europe region and had no problems. Both web apps were in different App Service Plans. I have not tested this scenario with both web apps in the same App Service Plan. Bear in mind that if you're using IP addresses/A records in your DNS, you'd need both web apps to have different IP addresses for the DNS to be able to differentiate between your web apps.
Try assigning the domain to Azure Traffic Manager and have the traffic manager forward the request to the second site. Azure Traffic Manager and Web Apps are two different systems so you might be able to assign the same domain name to a web app and a traffic manager.
Once the DNS cache has expired remove the domain from the old Azure web app and add it to the new one, then finally delete the Traffic Manager account.
Option 2
Set the TTL to something very small, say 5 seconds (I believe your hostname provider should let you set that up), wait for the new TTL to propagate through all the caches. Then switch the custom domain from one app to another, and set the TTL back to it's original value.
This will result in just a few seconds of downtime for any customers, but if you do it at a low-traffic time the effect shouldn't be too bad.

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